anyone have experience with Boss Bearings??

Building a backup engine for my bike. This engine is a 1976 Honda CR250M1 engine. I'm afraid I'm going to someday destroy my crank or cases and want a backup ready to drop in. Well one of the crank seals is getting a little difficult to buy these days. So I was looking around and ran across this Boss Bearing site were I can buy an aftermarket seal kit, aftermarket bearing kit, or aftermarket seal/bearing kit. Couldn't really find out much looking for reviews of this seller. My concern is that these are low-quality chinese bearings because I can buy the seal/bearing kit for about $60. This is six bearings and five seals. At local Allied bearing supplier, I paid more than that for my two main bearings last time I rebuilt my engine. Just wondering if anyone has used this place for bearings or seals. Thanks.

Thanks! I'll contact them for prices with U.S. bearings.